Lukasz Rachel on Non-Ricardian Macroeconomic Policy and Its Implications for Inflation - Macro Musings with David Beckworth Recap

Podcast: Macro Musings with David Beckworth

Published: 2025-11-17

Duration: 52 min

Guests: Lukasz Rachel

Summary

Lukasz Rachel discusses the impacts of non-Ricardian macroeconomic policies on inflation, emphasizing how structural forces and fiscal policies have influenced the neutral real interest rate (R-Star). He explores the implications of these policies for the future economic landscape.

What Happened

Lukasz Rachel, a former economist at the Bank of England and now with University College London, discusses his research on secular stagnation and the neutral real interest rate, known as R-Star. Rachel highlights how rising budget deficits and social spending have impacted interest rates, arguing that without them, the neutral rate would have been even lower. This could have led to deeply negative interest rates, creating challenges for monetary policy and economic growth.

Rachel's collaboration with Larry Summers at the American Economic Association meetings is revisited, where they presented a paper on secular stagnation. The paper argued that while structural forces were pushing interest rates down, fiscal policies were working in the opposite direction, creating a complex dynamic that needed to be understood quantitatively.

He explains that demographic changes, such as aging populations and declining productivity growth expectations, are key factors driving down the neutral real interest rate. Rachel also notes the importance of distinguishing between cyclical shocks and long-term structural trends when analyzing R-Star.

In a more recent paper, Rachel examines the post-COVID rise in market-based real interest rates, questioning whether this reflects a structural change or is simply a cyclical phenomenon. He introduces a toolkit to analyze R-Star, incorporating capital market equilibrium and transitional dynamics, providing a nuanced understanding of current interest rate trends.

Rachel discusses potential upside risks that could increase R-Star, including fiscal pressures, AI-driven productivity growth, and shifts in globalization. He emphasizes the importance of considering both safe and risky rates of return in understanding these dynamics.

The conversation also covers the implications of non-Ricardian fiscal policies, where government deficits directly impact demand and inflation. Rachel critiques the traditional Taylor Principle, arguing that it may not be sufficient in a non-Ricardian world where fiscal and monetary policies are deeply intertwined.

Finally, Rachel suggests that for effective macroeconomic management, there must be a coordinated approach between monetary and fiscal policies, recognizing their interconnectedness, especially in the context of high government debt levels.

Key Insights

• Rising budget deficits and increased social spending have prevented the neutral real interest rate, or R-Star, from falling to deeply negative levels, which would pose significant challenges for monetary policy and economic growth.
• Demographic changes, such as aging populations and declining productivity growth expectations, are major factors driving down the neutral real interest rate, necessitating a distinction between cyclical shocks and long-term structural trends in analysis.
• The post-COVID rise in market-based real interest rates is being scrutinized to determine whether it represents a structural change or a cyclical phenomenon, using a toolkit that incorporates capital market equilibrium and transitional dynamics.
• Non-Ricardian fiscal policies, where government deficits directly impact demand and inflation, challenge the traditional Taylor Principle, suggesting that coordinated monetary and fiscal policy approaches are necessary, especially in contexts of high government debt.